Because of the different evaluation criteria and the proportion of each index, even in the same university, the QS regional ranking in the same year is different from the main QS world university ranking. For example, the University of Hong Kong ranks first in Asia in the QS World University Rankings of 20 10, 20 10 and 20 12, and the world rankings range from 22nd to 23rd, but at 2010 and 20 12.